Pneumatic Winding Chucks are robust and long-life clamping devices. They are mounted (normally in pairs) on a carrier tube or winding shaft. The solid chuck body, the well protected internal air bladder, the rubber expansion segments (metal segments on request) and the robust clamping ring, connecting the chuck with the carrier tube (max diameter 79mm), allow the transmission of substantial torque forces. Available in standard dimensions for 150 - 152.4mm (6inch) Core ID. Customized dimensions on request.